AgroTech Journal (ATJ) is oriented to the regular publishing of research in the areas of agrotechnology. This journal is blind peer reviewer that applies an Open Journal System (OJS). The areas include agriculture, seed science, and technology, agronomy, horticulture, plant biotechnology, soil biotechnology, plant pests and diseases, plant breeding, plant physiology, fertilizers, and fertilization.

Abstract

The research purposed was compared of two extracts as molluscicidal activities from root of Derris elliptica Wallich. and Pangium edule Reinw seed, that assessed to 3-month old snails Pomacea canaliculata L. The Golden apple snails is widely regarded as worst invasive pest species in the rice growing area. It normally destroys the young stems and leaves paddy and could consume 7 – 24 rice seedlings per day. The experiment research started with the mortality test of the golden apple snail, meanwhile hexane extract fraction and etanol extract fraction have completely jumble mode; using the lethal concentration (LC) have mean to describe short term potency of poisonous (toxicity) from materials and can gave little effect or impact for environment; processing phytochemical test from n-hexane extract and etanol extract of root D.elliptica and P.edule showed positive to contain tanin, saponin and fenol. The data of LC50 from n-hexane fraction measure with probit analyze (9,905 mg L-1) by D.elliptica L. with high toxic category, and n-hexane fraction (11,574 mg L-1) by P.edule Reinw. with toxic category are more effective for golden apple snail control. The golden apple snail mortality was highest using 5000 ppm n-hexane fraction showed 93,3% from D.elliptica and using 5000 ppm n-hexane fraction from P.edule showed 63,3%. In conclusion, both of extracts from D.elliptica roots and P.edule seeds was showed potency as botanical mollusicicides and it can be apply in the field

Abstract

Customary leaders have dominant roles and influences, these facts are shown in the land clearing process (monahundau) and the harvesting process (meolu) of paddy rice crop. These processes begin with the opening ceremony or in the form of a small ritual carried out by customary leader numbering one person called Puusaraormandaranosara. The purpose of this study is to find out how the role of customary leaders in decision-making in the ethics of land clearing and harvesting processes in paddy rice farmers. Analysis of the data used in the form of qualitative descriptive analysis, where the data obtained is then described qualitatively using the Miles and Huberman model which consists of three stages, namely (1) Data Reduction, (2) Data Presentation, (3) Conclusion Drawing / Verification. The results of this study indicated that land clearing (monahundau) and the harvesting process (meolu) were influenced by hereditary customs in Puday Village, Wonggeduku Barat Sub-District, Konawe District. Monahundau is a land clearing process which is the first step to open a new planting season every year. Meoluis a harvesting process that is carried out in the same steps as the process of land clearing (observation, reciting intentions and praying silently for the best wishes desired in the harvesting process), and the final step is done by investigating at the rice fields who first turned yellow (ripe), then the rice fields that will be harvested first, the rice begins to be harvested when there is already a statement then the other farmers' land that has yellowed (ripe) may be harvested by themselves (meoludowo). Customary leaders are people chosen by the people of Puday village (puusaraormandaranosara) and have an influnce on decision making in the process of land clearing (monahundau) andharvesting (meolu)

Abstract

A field experiment was aimed at investigating the effect of natural guano organic fertilizers on growth and yield of Spring Onion (Allium fistulosum L.). The experiment was conducted from September to Nopember, 2014 in Unamendaa Village, Kolaka District. It was prepared by using a randomized block design (RBD) with single factor namely doses of natural guano organic fertilizers. The treatments consisted of 4 levels were : (1) G0 = control or no treatment, (2) G1 = dose of 6 kg unit-1 (equivalent to 5 t. ha-1), (3) G2 = dose of 12 kg unit-1 (equivalent to 10 t. ha-1) and (4) G3 = dose of 18 kg unit-1 (equivalent to 15 t. ha-1), respectively. Every treatment was replicated 3 times, therefore overall there were 12 experimental units. Data was collected on growth and yield parameters of Spring Onion : (1) plant height, (2) number of leaves, (3) number of tillers, (4) diameters of stem and (5) yield (plant fresh weight unit-1). Data obtained were analyzed using Analysis of Variance (Anova) and followed by Duncan’s Multiple Range Test (DMRT) at the 1 % level. The result of experiments showed that fertilizations using natural guano organic was significantly affected on : plant height, number of leaves, number of tillers, diameter of stem and plant fresh weight, respectively. Untill fertilization of 18 kg unit-1 (G3) were able to increased the growth and yield of Spring Onion, hence it was showed better performance on all parameters

Abstract

The preserve quality, freshness and extending shelf life of fruit could be done by storing the fruits in the refrigerated room, pressurized room or by modifying the atmosphere of the room. However, this type of storage cost is quite expensive, therefore needed another solution that is fruit coating using edible coating solution made from vegetable hydrocolloids. The aims of this study were to determine the best materials type among the three types of vegetable hydrocoloid materials, namely extract Aloe vera leaves, extract Ceiba pentandra leaves and extract Abelmoschus manihot leaves that are able to preserve the shelf life of M.acuminata fruit. This research use was a complete randomized design with four treatments, namely; without edible coating, edible coating of extract Aloe vera leaves, edible coating of extract Ceiba pentandra leaves, and edible coating of extract Abelmoschus manihot leaves, with three replications. The result showed that the lowest shrinkage percentage was found in edible coating of extract Aloe vera leaves with an average value of 3.43% and the highest was found in treatment without edible coating of 4.37%. At the end of observation the highest sugar content was obtained in edible coating of extract Aloe vera leaves of 20 oBrix while the lowest was in treatment without edible coating that was 16oBrix. In organoleptic test, panelists prefered edible coating of extract Aloe vera leaves with an value range of 4 or 5 equivalented with neutral or likes, and did not like of edible coating of wxtract Abelmoschus manihot leaves with an value range of 3 or 4 equivalented with slightly dislike or neutral. Based on the conducted observational, the edible coating of extract Aloe vera leaves was able to preserve the shelf life of M.acuminata fruit up to five days after harvesting

Abstract

Polymerase Chain Reaction (PCR)-based molecular techniques have been used to detect the polymorphism in plants. The utilization of molecular markers plays essential role in germplasm characterization and plant breeding since the information of DNA marker technology can be exchanged between laboratories and should have standard method to be reproducible. The molecular aspect has been commonly linked to DNA isolation protocol and polymorphic molecular marker, thus can be used for molecular research recommendation purposes. The objectives of this study were to evaluate the capability of microsatellite marker of Ebenaceae Family for amplifying Ebony DNA, and to determine the appropriate PCR annealing temperatures. The DNA isolation of Ebony leaves from Experimental Forest of Hasanuddin University Provenance was carried out using Genomic DNA Mini Kit (Plant) Geneaid protocol. Nine of seventeen selected primers from the Genus Diospyros were able to amplify Ebony DNA. Amplification products produced polymorphic bands with different annealing temperatures (ranged from 53 to 56°C). These nine polymorphic primers will be recommended to use for future studies in genetic diversity as well as pollen dispersal pattern analyses.

Abstract

Increased phenotypic diversity is needed to increase the economic value of Aglaonema. However, information on increasing phenotypic diversity of Aglaonema using gamma-ray irradiation has not been widely known. This study aimed to investigate the effect of gamma ray irradiation treatment to the performances of two varieties of Aglaonema. This research was arranged factorially using randomized group design (RKLT) of two factors consisting of 8 combinations of treatments that are 4 level of irradiation dose and 2 Aglaonema varieties. The results showed that the induction of gamma ray irradiation decreased the % viable of the plants, the number of leaves, leaf length, leaf width, and the % green color as well as increased the % blue on the leaves of Aglaonema Butterfly and Aglaonema Siam Aurora. The interaction between dose of irradiation and aglaonema varieties was obtained in the % red of leaf color. Both of Aglaonema varieties had a high radiosensitivity with LD50 values ranged of 16.70 - 17.14 Gy

Abstract

This study aimed to obtain information about the characteristics of 15 genotypes and to study a genetic similarity of each genotype that will be used for producing superior tomato varieties in lowlands. The research was conducted from March to August 2012 at the Experimental Field Leuwikopo Bogor Agricultural University, Darmaga Bogor. The experiment used The Randomized Complete Block Design (RCBD) using a single factor of genotype with three replications. Characterization and similarity analysis used the method of principal component analysis and cluster analysis. Based on principal component analysis and cluster analysis of tomato genotypes, it can be classified into three groups: group I (IPBT1, IPBT4, IPBT8, IPBT13, IPBT58, IPBT83 and IPBT84), Group II (IPBT3, IPBT23, IPBT30, IPBT33, IPBT34, IPBT53 and IPBT57) and group III (IPBT80). Characters with an influence on the genetic diversity of each component are the size of the cork layer between the scar stalk and the size of the center of the fruit in transverse slices. The genotypes with a high genetic similarity were IPBT1 and IPBT8, while IPBT30 with IPBT80 had a low genetic similarity

Abstract

Soybean is rich in protein and is one of the main sources of vegetable protein which essential in enhancing public nutrition. Climate change is the main trigger of the occurance of extreme weather events makes plants become more vulnerable to drought. Drought stress significantly affect the decline in soybean production, especially when it occurs during the reproductive phase. This research aimed to identify the response of soybean to water stress as a reference for determining the adaptive and tolerant varieties. The research was arranged in split-split plot design, with main plot was varieties (Dering and Argomulyo), the development phase (vegetative and generative phases) as the subplot, and water stress in the form of irrigation intervals (2, 5, and 10 days) as the sub-sub plots. The results showed that water stress during the vegetative phase has not statistically significant effect on soybean production. Soybean crop adapted to water stress by reducing the number of leaves, the leaf area, stomatal openings, as well as doing motion response by folding leaves. This crop adaptation mechanisms affecting the formation of dry matter quantity, seeds yield, water use efficiency, and radiation use efficiency

Abstract

This study aims to determine the effect of nitrogen levels, cellulolytic microorganisms and the interaction of both the aerobic decomposition rate of oil palm empty fruit bunches. The research was conducted at Home Compost STIP-AP Medan in April until July 2016. Research used a factorial randomized block design consisting of two factors and three replications. The first factor is the dose of nitrogen consisting of four levels i.e. N0 = without urea, N1 = dose of Nitrogen 2% of the dry weight of TKS which is 40% as much as 48 grams, N2 = dose of Nitrogen 4% of the dry weight of TKS which is 40% as much as 96 grams, N3 = Nitrogen dose of 6% of the dry weight of TKS which is 40% as much as 144 grams. The second factor is the cellulolytic microorganism isolates comprising four levels i.e. M0 = without cellulolytic microorganisms isolates, with isolates MOS M1 = 10 ml, M2 = isolate MOS 20 ml, isolate MOS M3 = 30 ml. From the research the effectiveness of multiple doses of nitrogen and cellulolytic microorganisms (MOS) on the rate of decomposition of oil palm empty fruit bunches can be deduced as follows, namely addition of nitrogen dose was able to reduce levels of C/N was 76.4% of the levels of C/N beginning. The best treatment is contained in N3 treatment. Addition of Microorganisms treatment cellulolytic (MOS) is able to reduce levels of C/N as much as 74.6% of the levels of C/N beginning. The best treatment is contained in M3 treatment. Interaction between giving treatment cellulolytic microorganisms Nitrogen and reducing levels of C/N as much as 79.4%. Interaction best treatment there in treatment N3M3.

Abstract

Drought causes hampered nutrient absorption and water uptake in plants hence abnormal growth and lower yield. One of alternative solutions is the development of maize varieties tolerant to drought stress through plant breeding. This study aims to find superior M3 mutant genotypes of maize that can adapt to dry land with high productivity. The study was conducted in green house of the Faculty of Agriculture, Universitas Hasanuddin using Split Plot Design. Water availability level was set as main plot consisted of 60%, 80% and 100% and maize mutant was set as subplot consisted of four M3 mutants, namely Bisma 100 gy, Bisma 200 gy, Lamuru 100 gy, and Lamuru 200 gy. In addition two varieties were used as controls ie. Bisma, and Lamuru resulted in total of 6 genotypes tested in the study. Mutant genotype of Bisma 200 gy showed tolerance to all water availability levels and significantly differed to other mutants including its parents indicated with higher yield. 100% water availability condition resulted in higher production than the other two water availability conditions with the average yield produced was 44.1 g per plant